US3763837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic choke control
Assignee: Motors Liquidation Co
•
Filing: 1972-07-14
•
Granted: 1973-10-09
•
Expires: 1992-07-14
Abstract
Abstract A control for an automatic choke with a bimetallic element to determine choke position. In a feedback control system, electrical signals from a temperature sensor at a control point and another at the bimetallic element are compared; and the difference is used to control electric power to a heater near the bimetallic element so that the temperature of the bimetallic element varies in accordance with the temperature at the control point.
Inventors
- 👤 V Orlando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:48
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/08; F02M1/10; F02M1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
In a control for a choke in an air induction passage for an engine, the engine also having a passage for hot exhaust gases, which passage passes in thermal proximity with the air induction passage at a location downstream from the choke, the control including a temperature responsive element effective to vary the operation of the choke, electrical heating means in thermal proximity with the temperature responsive element, first temperature sensing means in thermal proximity with the said location of the air induction passage, and a source of electric current; the improvement comprising, in combination: second temperature sensing means in thermal proximity with the temperature responsive eleMent; and circuit means controlled by the first and second temperature sensing means so as to vary the impedance from the source of electric current through the electrical heating means in accordance with the difference between the temperature at the point of the air induction passage and the temperature of the temperature responsive element.
Claim 2
Dependent Claim
160 words
In a control for a choke in an air induction passage for an engine, the engine also having a passage for hot exhaust gases, which passage passes in thermal proximity with the air induction passage at a location downstream from the choke, the control including a temperature responsive element effective to vary the operation of the choke, electrical heating means in thermal proximity with the temperature responsive element, first temperature sensing means in thermal proximity with the said location of the air induction passage, and a source of electric current; the improvement comprising, in combination: second temperature sensing means in thermal proximity with the temperature responsive eleMent; and circuit means controlled by the first and second temperature sensing means so as to vary the impedance from the source of electric current through the electrical heating means in accordance with the difference between the temperature at the point of the air induction passage and the temperature of the temperature responsive element.
References Cited (Backward Citations)
US3699937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |